David Einhorn's Greenlight Capital has taken a 5.1% stake in defense contractor Huntington...

David Einhorn's Greenlight Capital has taken a 5.1% stake in defense contractor Huntington Ingalls (HII+2.5%), according to an SEC filing. HII, a recent spinoff from Northrop Grumman (NOC), has lost more than 12% in the past three months, badly underperforming its peers. Einhorn sold out of some key positions in Q2, including [[YHOO], CAH and CIT.